Optical design and analysis of CWDM upstream TWDM PON for NG-PON2

• Published in: Optical fiber technology Vol. 19; no. 3; pp. 250 - 258
• Main Authors: Kim, Jongdeog, Park, Chang–Soo
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.06.2013
• Subjects: Burst-mode receiver; Passive optical network; Time division multiple access; Wavelength division multiplexing; Burst-mode receiver; Time division multiple access; Wavelength division multiplexing; Passive optical network
• ISSN: 1068-5200; 1095-9912
• DOI: 10.1016/j.yofte.2013.02.004

► We propose an asymmetric hybrid passive optical network for next-generation applications. ► The network architecture use based on eight wavelength plan in each direction. ► The overall power budget and link loss characteristics are studied with single-mode fibers. ► The optical transmission feasibilities with up to 60km distance fibers are investigated. ► Optical interface parameters are recommended for the principal physical layer specification. For passively reach-extended next-generation passive optical networks (NG-PONs), we propose an asymmetric hybrid PON architecture and wavelength plan for using eight 2.5Gbit/s coarse wavelength division multiplexing (CWDM) in the upstream direction and eight 10Gbit/s dense wavelength division multiplexing (DWDM) in the downstream direction, called Cu-TWDM PON. The power budget feasibilities, the optical path losses, and the dispersion power penalties in the CWDM upstream wavelengths are precisely investigated in terms of related specifications required to enhance the network coverage to over 40km with single-mode fibers (SMFs) based on ITU-T G.652.A and B and Corning’s SMF-28e, as the worst-case and the practical-case feasibilities, respectively. We also report on 10Gbit/s and 2.5Gbit/s transmission experiments up to 60km for the downstream and upstream links. Based on the analyses and experimental results, we provide guidelines for the physical media dependent layer specification of Cu-TWDM PON for NG-PON applications.